The angle of view, or the amount of a scene taken in by the lens, is governed by the focal length of the lens: for example, a short focal length will give a wide angle or view. So you can photograph different parts of the view just by changing lenses–as shown in the three pictures on the right. The girl and the camera stay in the same position for each photograph, showing that subject and background enlarge equally as the angle of view narrows. Read the rest of this entry »